Australian wild dogs are a unique species of wild animal in Australia, but their whole genome research has been blank. Recently, zhang Yaping, researcher of Kunming Institute of Zoology, Chinese Academy of Sciences, Researcher Mao Yu and Professor Peter Savolanin of the Royal Swedish Institute of Technology, carried out an in-depth study of the origin and wildization process of Australian wild dogs, thus revealing their origin and wildmechanisms, as well as a history of ancient human migration.
Zhang Shaojie, a researcher with the Zhang Yaping Task Force of Kunming Animal Research Institute, said that the Australian wild dog classification belongs to the canine genus, the gray wolf species, the Australian wild dog subspecies. Although it lives in Australia, which does not border other continents, it is not a native species. Based on Australia’s special geographical location, Australian wild dogs may have been brought in as a human when they migrated to Australia, so studying the group history of Australian wild dogs can also reflect the migration process of ancient Australian sage. In addition, it was originally domesticated by humans, but after arriving in Australia, it was out of human control and returned to the wild, and has been wild for at least 5,000 years. Because there are no other canines in Australia for a long time, Australian wild dogs are not hybridized with wolves or domestic dogs, making it the best model for studying wild.
Based on genome-wide evidence, the team proved that the ancestors of Australian wild dogs were domesticated domesticated in East Asia, which arrived in Australia about 9,900 years ago from southern China, and rapidly became wild in Australia.
According to previous research, in the history of mankind, there has been a famous “South Island diffusion” process, that is, five or six thousand years ago originated in China’s Fujian area of the South Island human, first migrated to China’s Taiwan, and then spread to the entire Pacific Ocean and Indian Ocean, its distribution span is so large, rare. Researchers have found that the time it took for domesticated dogs in southern China to go south to Australia does not match the “South Island spread” time, and may have been brought to Australia by an earlier and unknown migration of ancient humans.
Using the Australian wild dog model, the team found a number of interesting wild genes, mostly related to neurodevelopment, immunity, reproduction and digestive metabolism, which are closely related to the wild adaptation and survival of domestic dogs. Finally, the team analyzed the wild ingressation patterns of Australian wild dogs and found that some of their genetic regions were more like wolves than domestic dogs, possibly because Australian wild dogs originated from early domestic dogs that had not yet been fully domesticated.
Through the analysis of the wild dog in Australia, the research team deduces its wild model and provides new ideas for the future study of population migration and wilding. The findings were published in the journal Nature Communications.